The ice and snow has had major impact on air travel. Thousands of flights grounded all across the storm zone. With dallas the hardest hit. The airport there filled with stranded and frustrated flyers who spent the weekend living inside the term analysis. That's where clayton sandell is this morning. Good morning, clayton. Reporter: Good morning, robin. About 650 stranded travelers are waking up here this morning. About 400 flights already canceled today. The travel nightmares are spreading. Nationwide, about 1100 flights already canceled. That number to could go up. This morning, an icy stranglehold on air travel. Attention military vets. Reporter: The dallas ft. Worth airport paralyzed for 20four days by freezing rain. Many of the travelers grounded here since thursday night. A lot of people are tired. They're kind of fed up with waiting around. Reporter:4,000 people slept on cots friday evening. 2,000 overnighted on saturday. Sara and javier are stranded with a 3-year-old and baby. Hopefully get out of here tomorrow? Hopefully. Reporter: At least 2700 flights canceled. The misery map saw people seeing red. For these track athletes, a delay in portland meant missing school. I'm not going to complain. I'm happy. Reporter: In minneapolis-st. Paul, before any plane can take off, another delay, to shower in dee icing fluid. In philly, passenger seth wilson could barely see the planes outside. Inside, he couldn't see the end of the customer service line either. Then there's tom wagner. During layover in houston, he fell asleep in the back of an express jet plane. And somehow, got locked inside. I woke up. And, uh -- the lights were out. I was like, what's going on? Reporter: Express jet says it's investigating. Not everybody here in dallas was forced to sleep on a cot. There was a qantas flight forced back to the gate on friday. They were given the option to stay on the plane. The airline provided food, movie, entertain lt. It was like a campout on a 747. Sure it was, clayton. Just like it. A weekend like that, you better pack a lot of patience. No question. Try to make the best of it.

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